Personally I have been surprised by Bankera, I bought into the pre ICO and every week they have been paying the ETH
commissions into my wallet, also looking forward to Electroneum and BQX......
I have personal collection of three coins for a reason.
Ethereum:- The best altcoin which will never go down to zero because of the ICO smart contracts. It has got stable inflow of the investment which is keeping it at high the way it is currently. Hopefully after the hardfork worthiness will increase too.
Monero :- The mined coin for now in the altcoin industry after zcash. Love it for it's sustained prices and less vulnerability to drop to quickly to lose the profits over night.
Social Coin :- Recently launched on the three minor exchanger with 78% volume on etherdelta and continued rise in the prices. I bought it during the ICO very cheap so expecting much of the profit from it. The more important thing is it's achievement are great in terms of crowd reach and also they have got the unique buy back program.